Thats incorrect by all the info I find on turbo technology.

It should read:

Inducer: 68mm
Exducer: 60mm

On the turbine side the exducer and inducer are flipped for the air flow. Just comparing inducer to exducer doesn't really give and adequate view of what the turbo is capable, about the same as looking at just the A/R.

I suspect that a lot of what people think are HE351's are really the HE341's.

When they call you back see if you can get the measurements for the 341.

 

Thats what i have been told as well... something like a high flow housing?

I still pulled a cork out of my exhaust when i got rid of the 351, The cam was flowing way too much air for it

 

Your not supposed to tell me that.. I really want a PDR cam and to stick with my 351.

 

I suspected there were minor difference due to the blades not being exactly 180 degrees apart. the 58/65 is pretty close to what the actual is if one is not exact with the micrometer.

As far as the what I said is wrong, its still wrong terminology.

"Inducer" is where the air enters

"Exducer" is where the air exits

On the turbine side the air enters the major diameter and exits the small diameter.

On the compressor side the air enters the minor diameter and exits the major diameter.

You want to believe a minion reading from a script be my guest. If the temrinology is wrong its wrong.

 

There is also a huge difference between a Holeset 12 and S300 12 housing as far as flow goes. Thats where you gained the flow characteristiccs from.

 

Gotcha, I read the last post wrong..

So based on what Holset told me (and he was an egnieer, not just a random minion.. we had a good talk about turbos and he did know what he was reading and talking about) the HE351 is still a 60/60/9 right? Its based on the smallest readings of the two? Because thats where the air flows.. right?

 

Smallest to smallest makes as much sense as anything as those are the major restirctions in the air path.

Its confusing to compare the 60 wheel of the 351 to a SPS with a straight 71mm wheel that has the same spool characteristics on a larger housing. There is a lot more to turbo technology than just wheel size.

Kinda like looking at A/R making it one size fits all, it just work out that way depending on the application.

 

Either Way go for the cam!!

It sucked for me really just over 70 mph....stupid short G56 gearing had me pushing some serious boost at 2550rpm and 80 mph on flat ground. Near 20 psi. MY new turbo same speed I am around 10-12psi

Poor HE 351 felt like it was gonna blow if i was towing on the interstate, like 25-30 psi of boost cruising with 10k in tow at 75 mph...

 

Gotcha... Do you monitor DP?

I have seen sustained 25psi at 68mph towing 5K (30mph head wind)...

 

Naw i would like to have seen the exact drop but i dont have a a gauge and im a cheap ****. I know its pretty significant though. Just took another trip up to NC and cruise set to 80, on flat ground im boosting 8-10, where with stock turbo and helix cam I would was at nearly 20. Got 17.1 mpg on the way up here. Stock turbo I would have gotten around 15.5 doing 80.

 

Guys,

I know that this is an older post but it was mentioned in a more recent one. I read all of it and my head is kinda spinning as a lot of this is over it. My question, if it is one that has a direct answer, is can I get rid of EGR without changing the cam??

 

No, you must change the cam.

 

Timing chain? We don't need no stinking timing chains. Gear drive.

 

but i thought it was stated earlier in the post that the 03-04 had the SAME cam has 04.5 up?? If so whats creating the black oil on our 5.9's?

 

It's the 3rd injection event.

Even installing an aftermarket cam (which has absolutely no EGR effect or overlap built into it) in an 04.5 engine will not cure the instant black engine oil on these engines.